CN112611945A - Distribution network pin insulator detection device and detection method - Google Patents
Distribution network pin insulator detection device and detection method Download PDFInfo
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- CN112611945A CN112611945A CN202011375255.8A CN202011375255A CN112611945A CN 112611945 A CN112611945 A CN 112611945A CN 202011375255 A CN202011375255 A CN 202011375255A CN 112611945 A CN112611945 A CN 112611945A
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- induction
- clamp arm
- pin insulator
- induction coil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- Engineering & Computer Science (AREA)
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- Ceramic Engineering (AREA)
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- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a distribution network pin insulator detection device and a detection method, wherein the detection device comprises: a housing; the first induction clamp arm is elastically hinged to the shell, the second induction clamp arm is elastically hinged to the shell, and the second induction clamp arm and the first induction clamp arm are opposite to form a detection port; the split type induction coil comprises a first induction coil and a second induction coil, wherein part of the first induction coil is accommodated in the first induction tong arm, and part of the second induction coil is accommodated in the second induction tong arm; the device comprises a first state and a second state, wherein in the first state, the first induction clamp arm and the second induction clamp arm are separated from each other and form a gap so as to push the pin insulator steel pin into the detection port; in the second state, the first induction clamp arm and the second induction clamp arm are clamped under the elastic action, so that the first induction coil and the second induction coil are closed, and a current signal at the steel pin of the pin insulator can be induced.
Description
Technical Field
The invention relates to a distribution network pin insulator detection device and a detection method, and belongs to the technical field of distribution network pin insulator detection.
Background
The pin insulator is a main high-voltage electrical device for insulating and supporting the overhead line in the 10kV power distribution network, the using quantity is large, and the running state of the pin insulator directly influences the reliable and safe running of the 10kV power distribution network. Generally, during normal operation of a line, an insulator is always affected by factors such as mechanical force, electric field force, acid rain, dirt and the like, so that the insulating property of the insulator is gradually degraded, and finally, the insulator has low value and zero value phenomena, so that line faults are caused, and the safe operation of power distribution is seriously affected.
For insulator strings on a power transmission line, two measurement schemes are provided at present, one scheme is no-power-off measurement, detection equipment is provided with a direct-current high-voltage generator, and the scheme needs to carry out measurement on a power-off line; the other scheme is that a distributed voltage method is adopted, and whether the insulator is degraded or not is judged by measuring the distributed voltage of each insulator on the whole string of insulators. However, this solution cannot be used since 10KV lines have only one insulator. In addition, the scheme adopts a method for measuring leakage current to calculate the distribution voltage of the insulator to judge whether the insulator is degraded, is generally used for monitoring the insulation state of the whole string of insulators on line, adopts fixed-point monitoring and cannot be used for inspection of 10kv line insulators.
Disclosure of Invention
Based on the above, the invention provides a distribution network pin insulator detection device and a distribution network pin insulator detection method, so as to solve the technical problem that the insulating property of a pin insulator cannot be detected in the prior art.
The technical scheme of the invention is as follows: a distribution network pin insulator detection device, wherein the device comprises:
a housing;
a first induction clamp arm which is elastically hinged on the shell,
the second induction clamp arm is elastically hinged to the shell, and a detection opening is formed by the second induction clamp arm and the first induction clamp arm in an opposite mode;
the split type induction coil comprises a first induction coil and a second induction coil, wherein part of the first induction coil is accommodated in the first induction tong arm, and part of the second induction coil is accommodated in the second induction tong arm;
the device comprises a first state and a second state, wherein in the first state, the first induction clamp arm and the second induction clamp arm are separated from each other and form a gap so as to push the pin insulator steel pin into the detection port; in the second state, the first induction clamp arm and the second induction clamp arm are clamped under the elastic action, so that the first induction coil and the second induction coil are closed, and a current signal at the steel pin of the pin insulator can be induced.
In one example, the first sensing jawarm has a convex contact surface and the second sensing jawarm has a concave contact surface, the convex contact surface mating with the concave contact surface.
In one example, the first sensing arm has a first inclined surface thereon, the second sensing arm has a second inclined surface thereon, and the first inclined surface and the second inclined surface are connected to a junction of the convex contact surface and the concave contact surface.
In one example, the first sensing jawarm and the second sensing jawarm are rotatably connected to the housing through a rotating shaft, a torsion spring is arranged on the rotating shaft, and in a natural state, the first sensing jawarm and the second sensing jawarm clamp are clamped under the action of the torsion spring to form a closed detection port.
In one example, the apparatus further comprises:
and the insulating rod is connected to the shell.
In one example, the insulating rod comprises a first rod body and a second rod body, and the first rod body is transversely connected to the second rod body.
In one example, the apparatus further comprises:
the signal processing circuit is in signal connection with the split type induction coil;
and the microprocessor is in signal connection with the signal processing circuit.
In one example, the apparatus further comprises:
the airborne communication unit is arranged on the shell and is in signal connection with the microprocessor;
and the remote monitoring terminal is in communication connection with the airborne communication unit.
In one example, the signal processing circuit includes a low-pass filter circuit, a range switching circuit, a signal amplification circuit, a rectification circuit and a sampling circuit, which are connected in sequence, the low-pass filter circuit is in signal connection with the split type induction coil, and the sampling circuit is in signal connection with the microprocessor.
The invention also provides a detection method of the distribution network pin insulator detection device, wherein the detection method comprises the following steps: and after the first induction tong arm and the second induction tong arm are clamped under the elastic action, the first induction coil and the second induction coil close current signals at the position of the pin insulator steel pin.
The invention has the beneficial effects that: this detection device designs split type structure with first response tong arm and second response tong arm to install first induction coil and second induction coil wherein, when first response tong arm and second response tong arm were plied up under the elastic action, but first induction coil and the closed coil that forms inductive signal of second induction coil, and then, this detection device can directly insert the steel foot department of pin insulator and detect, detect swiftly convenient, efficiency obtains greatly improving.
In addition, the detection device can directly obtain the resistance value of the pin insulator by processing the detection signal so as to judge whether the resistance value of the pin insulator meets the requirement or not.
Drawings
FIG. 1 is a front view of the distribution network pin insulator detection device;
FIG. 2 is a perspective view of the distribution network pin insulator testing device;
FIG. 3 is a side view of the distribution network pin insulator detection device;
FIG. 4 is an enlarged partial schematic view of FIG. 3;
fig. 5 is a schematic view of the distribution network pin insulator detection device in an open state;
FIG. 6 is a schematic structural view of an insulating rod;
fig. 7 is a detection flow chart of the distribution network pin insulator detection device;
description of reference numerals:
1, a shell;
11 rotating shaft, 12 torsion spring;
2 a first induction jawarm;
21 contact convex surface, 22 first inclined surface, 23 third inclined surface;
3 second induction tong arm
31 contact concave surface, 32 second inclined surface, 33 fourth inclined surface;
4 split type induction coil
41 a first induction coil, 42 a second induction coil;
5 insulating rod
51 a first rod, 52 a second rod.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 7, a distribution network pin insulator detection device according to an embodiment of the present invention includes a housing 1, a first induction clamp arm 2, a second induction clamp arm 3, and a split type induction coil 4.
The shell 1 is mainly used for mounting a first induction clamp arm 2, a second induction clamp arm 3 and a part of split type induction coils 4. The first induction clamp arm 2 is elastically hinged on the shell 1. Second response tong arm 3 elastic hinge connects on casing 1 to second response tong arm 3 and first response tong arm 2 relatively form and detect the mouth. The split induction coil 4 comprises a first induction coil 41 and a second induction coil 42, part of the first induction coil 41 being housed within the first induction jawarm 2 and part of the second induction coil 42 being housed within the second induction jawarm 3.
Due to the structure, the device has a first state and a second state, and in the first state, the first induction clamp arm 2 and the second induction clamp arm 3 are separated from each other and form a gap so as to push the pin insulator steel pin into the detection port; in the second state, the first induction jawarms 2 and the second induction jawarms 3 are clamped under the elastic action to close the first induction coil 41 and the second induction coil 42, so as to induce a current signal at the steel pin of the pin insulator.
This detection device designs into split type structure with first response tong arm 2 and second response tong arm 3 to install first induction coil 41 and second induction coil 42 wherein, when first response tong arm 2 and second response tong arm 3 were when the effect of elasticity is lower pincers, but first induction coil 41 and second induction coil 42 closed formation induction signal's closed coil, and then, this detection device can direct insert the steel foot department of pin insulator and detect, it is swift convenient to detect, efficiency obtains greatly improving.
Further, the first sensing jawarm 2 has a convex contact surface 21, and the second sensing jawarm 3 has a concave contact surface 31, and the convex contact surface 21 is engaged with the concave contact surface 31. The first sensing jawarm 2 has a first inclined surface 22, the second sensing jawarm 3 has a second inclined surface 32, and the first inclined surface 22 and the second inclined surface 32 are connected to the junction of the convex contact surface 21 and the concave contact surface 31.
Particularly, this kind of structure makes first response tong arm 2 and second response tong arm 3 form an contained angle in the outside of its contact department, can aim at the steel foot of insulator with this contained angle during the use, makes first response tong arm 2 and second response tong arm 3 separate each other and form the breach through the mode that pushes away to the cover that the detection mouth can be quick detects on the steel foot.
Further, the first sensing arm 2 has a third inclined surface 23 on the inner side thereof, the second sensing arm 3 has a fourth inclined surface 33 on the inner side thereof, and the third inclined surface 23 and the fourth inclined surface 33 are connected to a junction between the convex contact surface 21 and the concave contact surface 31. This kind of structure makes first response tong arm 2 and second response tong arm 3 in the inboard of its contact department, forms an contained angle in detecting the mouth promptly, and after the detection is accomplished, the mode of accessible pulling makes first response tong arm 2 and second response tong arm 3 separate each other and form the breach to the steel foot can be quick break away from out from detecting the mouth.
Further, first response tong arm 2 and second response tong arm 3 all rotate through pivot 11 and connect on casing 1 to be equipped with torsional spring 12 on pivot 11, under the natural state, first response tong arm 2 and second response tong arm 3 clamp down under torsional spring 12's effect and close, form confined detection mouth. The structure is simple and the cost is low.
Further, the detection device further comprises an insulating rod 5 connected to the housing 1. During detection, the shell 1 can be operated through the insulating rod 5, and the purpose of high-altitude detection operation is further achieved.
Further, the insulating rod 5 includes a first rod 51 and a second rod 52, and the first rod 51 is transversely connected to the second rod 52. In this embodiment, the first rod 51 is vertically connected to the top end of the second rod 52 to form a structure similar to a 7 shape, and this structure is particularly suitable for rapidly detecting pin insulators on a distribution network line on the ground, and can effectively improve the detection efficiency.
Furthermore, the detection device also comprises a signal processing circuit and a microprocessor, wherein the signal processing circuit is in signal connection with the split type induction coil 4, and the microprocessor is in signal connection with the signal processing circuit. During detection, a detection signal is preprocessed through a signal processing circuit and then input into a microprocessor for processing. In this embodiment, the microprocessor is STM32F103C 8.
Furthermore, the signal processing circuit comprises a low-pass filter circuit, a range switching circuit, a signal amplification circuit, a rectification circuit and a sampling circuit which are connected in sequence, wherein the low-pass filter circuit is in signal connection with the split type induction coil 4, and the sampling circuit is in signal connection with the microprocessor. In this embodiment, the low-pass filter circuit is an RC low-pass filter, the range switching circuit switches the range by using an analog switch, the signal amplification circuit is a differential operational amplifier, the rectification circuit is a half-wave rectification circuit, and the sampling circuit is an AD sampling circuit.
Specifically, during detection, the split type induction coil 4 performs RC low-pass filtering on acquired signals, the range is switched through an analog switch, the signals are amplified through a differential operational amplifier, then the signals are rectified through a half-wave rectifying circuit and then input to an AD pin of a microprocessor STM32F103C8 to perform conversion from analog signals to digital signals, the microprocessor STM32F103C8 performs software filtering through an arithmetic mean filtering method after acquiring the signals, arithmetic mean operation is performed by continuously taking N sampling values, and finally the obtained digital quantity is converted into a resistance value so as to judge whether the resistance value of the pin insulator meets the requirement, namely whether the insulator is safe.
Furthermore, this detection device still includes airborne communication unit and remote monitoring terminal, and airborne communication unit sets up on casing 1, with microprocessor signal connection, remote monitoring terminal and airborne communication unit communication connection. In this embodiment, the onboard communication unit may be an ultra-low power consumption wireless processing module ESP8266, and the remote terminal may be a networked computer or a smartphone. The structure enables the microprocessor to transmit the processing result to the remote monitoring terminal through the airborne communication unit, and the processing result is convenient to check and record.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A distribution network pin insulator detection device, wherein the device comprises:
a housing (1);
a first induction clamp arm (2) which is elastically hinged on the shell (1),
the second induction clamp arm (3) is elastically hinged to the shell (1), and the second induction clamp arm (3) and the first induction clamp arm (2) are opposite to form a detection port;
a split type induction coil (4) comprising a first induction coil (41) and a second induction coil (42), wherein part of the first induction coil (41) is accommodated in the first induction jawarm (2), and part of the second induction coil (42) is accommodated in the second induction jawarm (3);
the device comprises a first state and a second state, wherein in the first state, the first induction clamp arm (2) and the second induction clamp arm (3) are separated from each other and form a gap so as to push the pin insulator steel pin into the detection port; in the second state, the first induction tong arm (2) and the second induction tong arm (3) are clamped under the elastic action, so that the first induction coil (41) and the second induction coil (42) are closed, and a current signal at a pin insulator steel pin is induced.
2. The distribution network pin insulator detection device according to claim 1, wherein the first sensing jawarm (2) has a convex contact surface (21) and the second sensing jawarm (3) has a concave contact surface (31), and the convex contact surface (21) is matched with the concave contact surface (31).
3. The distribution network pin insulator detection device according to claim 2, wherein the first sensing clamp arm (2) is provided with a first inclined surface (22), the second sensing clamp arm (3) is provided with a second inclined surface (32), and the first inclined surface (22) and the second inclined surface (32) are connected at the joint of the convex contact surface (21) and the concave contact surface (31).
4. The distribution network pin insulator detection device according to claim 1, wherein the first induction clamp arm (2) and the second induction clamp arm (3) are rotatably connected to the housing (1) through a rotating shaft (11), a torsion spring (12) is arranged on the rotating shaft (11), and in a natural state, the first induction clamp arm (2) and the second induction clamp arm (3) are clamped under the action of the torsion spring (12) to form a closed detection port.
5. The distribution network pin insulator testing device of claim 1, wherein the device further comprises: and the insulating rod (5) is connected to the shell (1).
6. The distribution network pin insulator detection device according to claim 5, wherein the insulation rod (5) comprises a first rod body (51) and a second rod body (52), and the first rod body (51) is transversely connected to the second rod body (52).
7. The distribution network pin insulator testing device of claim 1, wherein the device further comprises:
the signal processing circuit is in signal connection with the split type induction coil (4);
and the microprocessor is in signal connection with the signal processing circuit.
8. The distribution network pin insulator testing device of claim 7, wherein the device further comprises:
the airborne communication unit is arranged on the shell (1) and is in signal connection with the microprocessor;
and the remote monitoring terminal is in communication connection with the airborne communication unit.
9. The distribution network pin insulator detection device according to claim 7, wherein the signal processing circuit comprises a low-pass filter circuit, a range switching circuit, a signal amplification circuit, a rectification circuit and a sampling circuit which are connected in sequence, the low-pass filter circuit is in signal connection with the split type induction coil (4), and the sampling circuit is in signal connection with the microprocessor.
10. The detection method of the distribution network pin insulator detection device of any one of claims 1 to 9, wherein the detection method comprises the following steps: and the first induction tong arm (2) and the second induction tong arm (3) are separated from each other to form a gap, a pin insulator steel pin is pushed into the detection port from the gap, and after the first induction tong arm (2) and the second induction tong arm (3) are clamped under the elastic action, a current signal at the position of the pin insulator steel pin is closed by the first induction coil (41) and the second induction coil (42).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011375255.8A CN112611945A (en) | 2020-11-30 | 2020-11-30 | Distribution network pin insulator detection device and detection method |
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| CN202011375255.8A CN112611945A (en) | 2020-11-30 | 2020-11-30 | Distribution network pin insulator detection device and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114113830A (en) * | 2021-11-02 | 2022-03-01 | 国网河北省电力有限公司保定供电分公司 | Instrument operating condition detection device |
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